2014/06/30 by Jun Li, Rong-Jia Yang, Rongjia Yang +1
Physics and Astronomy · #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #Statistical Mechanics and Entropy #astro-ph.CO #gr-qc
paper · pdf · doi:10.1088/1475-7516/2014/12/043
published as JCAP12(2014)043 · 12 pages, 9 figures
openalex publication_date 2014/12/19 · arxiv created 2014/12/28 · arxiv updated 2014/12/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We apply the Statefinder hierarchy and the growth rate of matter perturbations to discriminate modified Chaplygin gas (MCG), generalized Chaplygin gas (GCG), superfluid Chaplygin gas (SCG), purely kinetic k-essence (PKK), and ΛCDM model. We plot the evolutional trajectories of these models in the Statefinder plane and in the composite diagnostic plane. We find that GCG, MCG, SCG, PKK, and ΛCDM can be distinguished well from each other at the present epoch by using the composite diagnostic ( z ), S (1) 5 . Using other combinations, such as S (1) 3 , S (1) 4 , S (1) 3 , S 5 , ( z ), S (1) 3 , and ( z ), S 4 , some of these five dark energy models cannot be distinguished.